PART 3.a. Easing out the damage
Once the retainer was removed it was easliy striaghtened using a hammer on the anvil.
The next step was the ease out the crease and the major dents. To achieve this a dolly was made that could slide into the trim and be worked down the length of it to ease out the major damage. An old bolt and a few minutes work with the grinder produced this nifty tool.
A bit of work on the anvil using the dolly (tap until it rings) and most of the damage had been addressed and the trim naturally straightened.